.yin{display: none;}
.xian{display: block;}
#all{
    width: 600px;
    margin: 0 auto;
}
#top{
height: 60px;
    border: 1px solid red;
}
#top img{
    display: block;
    height: 40px;
    position: absolute;
    margin: 10px 0 0 460px;
}
#top div{
    border: 1px solid gray;
    width: 150px;
    height: 45px;
    line-height: 45px;
    text-align: center;
}
#top div:nth-child(2){
    margin: 15px 0 0 20px ;
}
#top div:nth-child(3){
    margin: -47px 0 0 180px ;
}
#ipt1,#ipt2{
    cursor: pointer;
}
#all-1{
    background-color: gray;
}
#mid{
    border: 1px solid green;
    height: 230px;
}

#mid div:nth-child(1),#mid div:nth-child(2){
    height: 180px;
}
#mid div:nth-child(3)
{
    border: 1px solid red;
    height: 50px;
}
#mid #but1{
    margin-left: 20px;
    margin-top: 13px;
    width: 100px;
    height: 30px;
    background-color: green;
    color: #FFFFFF;
}
#mid #but2{
    border: none;
    padding: 0 0 0 16px ;
    background: url("../image/but1.png") no-repeat;
    float: right;
    margin-top: 13px;
    margin-right: 20px;
}

#bot{
    height: 180px;
}

#bot-1,#bot-2{
    height: 180px;
}
#bot-1{
border: 1px solid green;
}
#bot-2{
    border: 1px solid pink;
}